E93 M3 front swaybar - more understeer?

[RimasRS]

Originally Posted by pixelblue

because having a roof makes the car more rigid and the chassis less prone to twisting. that's why most convertibles have extra bracing support to make the car more rigid

I understand that convertible needs more bracing support but if convertible is even more prone softer why it has thicker sway it is not for increasing understeer I guess...
Im trying to find out because I was ready to buy new sway and now I think I really dont need it anymore